Wolf hair, wool, double brush, long peak, medium peak and short peak, please explain the difference between these six kinds.

Yang Haobi: Soft performance, suitable for writing all kinds of calligraphy, splashing ink on mountains and rivers, and freehand brushwork on flowers.

Double-tube brush: both rigid and flexible, easy to use. Suitable for writing small and medium-sized regular script, meticulous portrait, retouching photography and industrial plate making.

Purple brush: flexible and round, suitable for small and medium-sized regular script and industrial drawings.

Langhao: vigorous and powerful, suitable for painting and calligraphy, suitable for splashing ink on mountains and rivers, freehand brushwork on flowers, and also suitable for writing all kinds of calligraphy.